/** * zfcp_adapter_dequeue - remove the adapter from the resource list * @adapter: pointer to struct zfcp_adapter which should be removed * locks: adapter list write lock is assumed to be held by caller */ void zfcp_adapter_dequeue(struct zfcp_adapter *adapter) { int retval = 0; unsigned long flags; cancel_work_sync(&adapter->stat_work); zfcp_fc_wka_ports_force_offline(adapter->gs); sysfs_remove_group(&adapter->ccw_device->dev.kobj, &zfcp_sysfs_adapter_attrs); dev_set_drvdata(&adapter->ccw_device->dev, NULL); /* sanity check: no pending FSF requests */ spin_lock_irqsave(&adapter->req_list_lock, flags); retval = zfcp_reqlist_isempty(adapter); spin_unlock_irqrestore(&adapter->req_list_lock, flags); if (!retval) return; zfcp_fc_gs_destroy(adapter); zfcp_erp_thread_kill(adapter); zfcp_destroy_adapter_work_queue(adapter); zfcp_dbf_adapter_unregister(adapter->dbf); zfcp_free_low_mem_buffers(adapter); zfcp_qdio_destroy(adapter->qdio); kfree(adapter->req_list); kfree(adapter->fc_stats); kfree(adapter->stats_reset_data); kfree(adapter); }
void zfcp_adapter_unregister(struct zfcp_adapter *adapter) { struct ccw_device *cdev = adapter->ccw_device; cancel_work_sync(&adapter->scan_work); cancel_work_sync(&adapter->stat_work); zfcp_destroy_adapter_work_queue(adapter); zfcp_fc_wka_ports_force_offline(adapter->gs); zfcp_adapter_scsi_unregister(adapter); sysfs_remove_group(&cdev->dev.kobj, &zfcp_sysfs_adapter_attrs); zfcp_erp_thread_kill(adapter); zfcp_dbf_adapter_unregister(adapter->dbf); zfcp_qdio_destroy(adapter->qdio); zfcp_ccw_adapter_put(adapter); /* final put to release */ }
int zfcp_qdio_setup(struct zfcp_adapter *adapter) { struct zfcp_qdio *qdio; qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL); if (!qdio) return -ENOMEM; qdio->adapter = adapter; if (zfcp_qdio_allocate(qdio)) { zfcp_qdio_destroy(qdio); return -ENOMEM; } spin_lock_init(&qdio->req_q_lock); spin_lock_init(&qdio->stat_lock); adapter->qdio = qdio; return 0; }
/** * zfcp_adapter_enqueue - enqueue a new adapter to the list * @ccw_device: pointer to the struct cc_device * * Returns: 0 if a new adapter was successfully enqueued * -ENOMEM if alloc failed * Enqueues an adapter at the end of the adapter list in the driver data. * All adapter internal structures are set up. * Proc-fs entries are also created. * locks: config_mutex must be held to serialize changes to the adapter list */ int zfcp_adapter_enqueue(struct ccw_device *ccw_device) { struct zfcp_adapter *adapter; /* * Note: It is safe to release the list_lock, as any list changes * are protected by the config_mutex, which must be held to get here */ adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL); if (!adapter) return -ENOMEM; ccw_device->handler = NULL; adapter->ccw_device = ccw_device; atomic_set(&adapter->refcount, 0); if (zfcp_qdio_setup(adapter)) goto qdio_failed; if (zfcp_allocate_low_mem_buffers(adapter)) goto low_mem_buffers_failed; if (zfcp_reqlist_alloc(adapter)) goto low_mem_buffers_failed; if (zfcp_dbf_adapter_register(adapter)) goto debug_register_failed; if (zfcp_setup_adapter_work_queue(adapter)) goto work_queue_failed; if (zfcp_fc_gs_setup(adapter)) goto generic_services_failed; init_waitqueue_head(&adapter->remove_wq); init_waitqueue_head(&adapter->erp_ready_wq); init_waitqueue_head(&adapter->erp_done_wqh); INIT_LIST_HEAD(&adapter->port_list_head); INIT_LIST_HEAD(&adapter->erp_ready_head); INIT_LIST_HEAD(&adapter->erp_running_head); spin_lock_init(&adapter->req_list_lock); rwlock_init(&adapter->erp_lock); rwlock_init(&adapter->abort_lock); if (zfcp_erp_thread_setup(adapter)) goto erp_thread_failed; INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); INIT_WORK(&adapter->scan_work, _zfcp_fc_scan_ports_later); adapter->service_level.seq_print = zfcp_print_sl; /* mark adapter unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); dev_set_drvdata(&ccw_device->dev, adapter); if (sysfs_create_group(&ccw_device->dev.kobj, &zfcp_sysfs_adapter_attrs)) goto sysfs_failed; atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); if (!zfcp_adapter_scsi_register(adapter)) return 0; sysfs_failed: zfcp_erp_thread_kill(adapter); erp_thread_failed: zfcp_fc_gs_destroy(adapter); generic_services_failed: zfcp_destroy_adapter_work_queue(adapter); work_queue_failed: zfcp_dbf_adapter_unregister(adapter->dbf); debug_register_failed: dev_set_drvdata(&ccw_device->dev, NULL); kfree(adapter->req_list); low_mem_buffers_failed: zfcp_free_low_mem_buffers(adapter); qdio_failed: zfcp_qdio_destroy(adapter->qdio); kfree(adapter); return -ENOMEM; }